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[bahy-prod-uh kt] /ˈbaɪˌprɒd əkt/
a secondary or incidental product, as in a process of manufacture.
the result of another action, often unforeseen or unintended.
Origin of by-product
First recorded in 1900-05 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for byproduct
Contemporary Examples
Historical Examples
  • Or, to put it in other words, medival witchcraft was a byproduct of the civilisation of the Roman Empire.

    Irish Witchcraft and Demonology

    St. John D. (St. John Drelincourt) Seymour
  • The cook, although upset by my reference to kings, lost none of the dignity of serving the byproduct of the Alaska cod.

    The Flying Bo'sun

    Arthur Mason
  • Thus the initial stage in the making of clothes may have been a byproduct of the hunting habit.

    Man, Past and Present Agustus Henry Keane
  • Benzol from byproduct coking ovens also can be used, but quantitatively is totally inadequate.

  • A large part of decision is intuitive; it is the byproduct of the subconscious.

    The Armed Forces Officer

    U. S. Department of Defense
British Dictionary definitions for byproduct


a secondary or incidental product of a manufacturing process
a side effect
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for byproduct



also byproduct; 1857, from by + product.

Online Etymology Dictionary, © 2010 Douglas Harper
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byproduct in Science
Something produced in the process of making something else. When plants produce carbohydrates by photosynthesis, oxygen is released as a by-product. Asphalt and paraffin are by-products of the process of refining crude oil into gasoline.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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